# Create property definition `CreatePropertyDefinition` `POST /api/propertydefinitions` - [OpenAPI fragment](https://www.lusid.com/docs/api/lusid/endpoints/property-definitions/CreatePropertyDefinition.json) - [Rendered page](https://www.lusid.com/docs/api/lusid/endpoints/property-definitions/CreatePropertyDefinition) Define a new property. ## Referenced schemas - [CreatePropertyDefinitionRequest](https://www.lusid.com/docs/api/lusid/schemas/CreatePropertyDefinitionRequest.txt) - [PropertyDefinition](https://www.lusid.com/docs/api/lusid/schemas/PropertyDefinition.txt) [< Property Definitions](https://www.lusid.com/docs/api/lusid/endpoints/property-definitions/llms.txt)